Grinding machine



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June 26, 1928. 1,674,672

. M. L. WILLIAMS L I GRINDING MACHINE A I Filed Feb. 18, 1922 6 Sheets-Sheet 2 a A? a i M 1 J5 I 2 I n n 9 l I v a a 2 June 26, 1928.

M; L. WlLLlAMS GRINDING MACHINE Filed Feb. 18. 1922 6 Sheets-Sheet '3 z aa June 26, 1928.. 1,674,672 M. L. WILLIAMS GRINDING MACHINE Filed Feb. 1 1922 6 Sheets-Sheet 4 June 26,- 192s.

M. L.. WILLIAMS GRINDING momma Filed Feb. 18. 1922 6 Sheets-Sheet 5 4 ml. HHHH W I M; L. WILLIAMS I GRINDING MACHINE v Filed Feb. 18. 1922 6 Sheets-Sheet 6 I I I R Q i I l I l I If i I N figzf'enz orpfizlness" Q flartaz l. mllzam w I mw.

Patented J1me 2 6, 1928.

UNITED STATES MARTIN -L. WILLIAMS, or MIS HAWAKA, INDIANA.

GRINDING MACHINE.

Application filed February 18, 1322. Serial No. 537,388.

This invention relates to improvements in grinding machines and refers more particularly to a machine in which-thecyllnders of an enginemay be ground automatically after the amount of the out has been ascertamed and the cylinder block bolted in position.

Among the objects of the invention are to provide a grinding machine in which the grinding wheel while being drlven at a hlgh rate of speed is slowly rotated about the 1nner walls of the cylinder due to the positioning of two eccentric sleeves in which. the grinding spindlefis mounted, and bes des being accurately rotated about the cyllnder walls,-the wheel'isgradually' and at a" predetermined rate of speed, fed to the bottom of the hole so that the grinding is effected 1n a uniform mannerthroughoutthe length of the cylinder, and the metal removed. during the grinding operation is uniform'throughout the entire length of the hole.

Fig. 1 is a side View of the machine. I Fig. 2 is a front View of the machine. Figi 3 is a sectional view taken along the I line 3-3 in Fig. 4; looking inthe direction of the arrows.

Fig. 4 is a view taken along theline 4-4 shownbin Figs. 1' and 3 looking inthe direction of the arrows. I i t Fig. 5 is a view taken along the line 55 in Fig. 4 looking in the direction of the arrows. J

' Fig. 6 is a. view taken along the line 6-6 in Fig.5. i

Referring to the drawings there are three major movements of the machine, the drives of which will betreated separately.

The first movement is the direct belt drive to the grinding wheel spindle. The second is the drive to the eccentric sleeves by means of which the axis of the grinding wheel is rotated around within the cylinder which is being ground. The third drive isthat which raises and lowers the head upon which the grinding wheel is mounted; The lowering and raising of the head has to do with the feeding of the grinding wheel from thetopof the hole to be ground to the bottom and that the grinding spindle, the eccentric sleeves and the driving mechanism including the motor, all aremounted upon the head l which is raised and lowered on the frame during the grinding operation. I

The major fixed portions of the machine comprise a base upon'which is mounted anuprightframe 2. This upright frame. has

an open portion 3, the sides of which are meshed in the form of ways 4. These ways have. mounted thereon racks'5 which areengaged by gears in the raising and lowering of the head. The head unit which is raised and lowered on the frame'mayv be considered as a unit'6 upon which is mounted the motor 27 To the head'6 are attached cables not shown, which pass over pulleys positioned in the .toppulley casings 8 and are fastened to counter balance weights 9 which are raised and Lpwered traveling opposite with the travelingof the head and, serving to counter balance the weight of the. head. The frame is constructed to :formwells 10 in which the counter balance'weightsare positioned. r

I The grindingv wheel spindle drive consists in nothing more than a belthconnection 11 between the pulley 12 mounted upon a motor 7 and pulley 13 mounted uponithefgrinding wheel spindle 14. An idler pulley 15 upon whichis automatically imposed at all, times a constant spring tension, contacts the belt due to the spring'pivotbearing 16.

The function of the automatic spring tensioned idler pulley is to maintain a constant tension upon the belt as there is a loosening and tightening effect produced by the eccentrrc sleeves in which the, grinding wheel spindle is mounted.

The second drive is that to the outer eccentric sleeve which gives the rotative move-I ment 'to the axis of thegrinding wheel during the grinding operation. Tov the lower end of the motor shaft is fixed a pinion l7 which meshes with a gear. 18 mounted upon the studshaft 19. integral with the larger pinion-18 meshes .witha gear 20 upon the vertical shaft 21. "At the upperextremity V of thisvertical shaft isahevel pinion .22

meshing with a second bevel 23 mounted on the shaft 24. Between the bearings supporting the shaft 24 are mounted two plnions of different sizes, namelyv 25and 26. These pinionsmesh with larger pinions 27 and 28 respectively on a shaft 29 positioned below theshaft24. These latter. pinions 27 and 28 are loosely mounted upon the shaft 29 and are age-gentle with the clutch crab 30 which is manipulated through the senescent-S 3t and 32 by means of a lever 33. These gears manipulated by the clutch give a variable speed change to the shaft 29 due to the dif- LlTerent-ial gearing. At the forward extremity of the shaft 29 is mounted a bevel gear 34 meshing with the sleeve bevel 35 which is fixedly mounted upon the outer circumference of the sleeve 36. The sleeve 36 rotates upon an inner eccentric stationary sleeve 37. In the bottom of the inner sleeve is fitted an arbor 38 which carries the grinding wheel spindle 14. :On the lower extension of the sleeve 37 is a gear 37* which meshes with a worm 37. This worm in turn is meshed by a second worm wheel 37 by means of which'a micrometi'ie setting of thesleeyes relative each other may be made. This defii ite setting is made by means of a pointer fixed to the outer sleeve and registering with graduations made on the circumference ot the lower sleeve at 37. The details as to the micrometric setting are unimportantto the invention other than the fact that theamount of eccentricity maybe accurately set upon the sleeves" prior to grinding. When the axes of the grinding wheel spindleand the two sleeves concide', the grinding wheel is fed directly downward without rotative movement of itsai is, but when the axes "of the grinding wheel spindle and the sleeves do' not "coincide the axis of the grinding wheel spindle given a rotati-ve nio'vement andit .ifed downward during the grinding operation The vertipal' movement of the head produced by gears meshing with the racks 5 on the ways 4'," Qives the gi'in dingwheel its vertical travel from the top to the botto n of the cylinderhole. This third drive is likewiseta'lien from the motor tl' rough the same t'i'a'in of gene as that wliich 'drives the outer eccentric sleeve. ihe drive connections are identical the driven shaft 329. Q11 this shaft, in addition'to the bevel gear 34, there is mounted centrally thereof a'second bevel gear 39- Meshing with the'hevel gear 39 is a secondbevel gear40 which is mounted in close relation to a second shaft 42. On shaft 41 are mounted diilerent size gears 43 meshing with multiple gears 44 on the shaft 42; The small gears on the shaft 41 meshwith the larger gears on shaft 42 and vice versa. The 'slia-tt'41 is hollow to accommodate a slidable key'arrangement 45 which is oper atedby handle 46. Thegears43are rotatably mounted upon the shaft 41 while the multiple gears are fixedly mounted on the shaft 42, so by selecting any desired pinion or gear 43 by'mea'ns of the slidable ltey 45 it is possible to select different speeds at which the "shaft-s will be rotated. The drive from the shaft 41 to the shaft 42 is transmitted through a bevel gear 47 mounted on the outer extremity of the shaft. This gear meshes with two bevel gears 48 and 49 positioned below and above the bevel gear and rotatably mounted, on the vertical shaft 50. Between the bevel gears 48 and 49 is positioned a clutch crab 51 which is centrally grooved to accommodate the ring ot the clutch yoke 53. The upper and lower arms 53 and 53 of the clutch yoke bear on a'secondary shaft 54 which is also vertically mounted in the reverse mechanism casing 55. Upper and lower latches 56 and 5"? are notched at to c-a tch an'd hold projections 59 on'tlie arms of the yolge when it is pushed up or down by inea ns of the reverse handle 60 or the automatic tripping rod 61 and Wedge 62 positioned on the extremity or the rod in connection with the upper, yoke arm; Flat springs 63 overlie the latches so that they will at all times eontact the arms of the yoke and drop into place behind theprojections 59 when the yoke is moved to an up or down position. i i

The operation ot the device is such that when it is desired. to lower the headby means of the automatic tee d, the handle 60 is pushed in that the yoke which is pr med to the shaft 54, moves upward and the latch 57 drops behind the projection 5ll a ndthe clutch crab is caused to engage the upper bevel gear 49 so thatthe gear will rotate the-shaft to lower the headthrough the complete lowering drive" hereafter more completely explained.

i l hen the grinding wheel has moved to the bottom of the hole'and it is desired 'to raise the head automatically, the handle pulleilouft, atwliich time the latch '57 is raised andthe latch 5(i' dropping in place behind the. projection 59 ontlie arm 53. By this inoyenieht ofthe yolte the clutch crab will engage the lower bevel gear eltland cause the shaft 50 to rotate in the opposite direction toraise the head. Compression springs 64 are positioned about the shaft 54 between the arms 53 and 53" oi the yoke to hold the yoke naturally in a neutral position as it appears in Fig. 5when the automatic drive is not used. I

There ispositioned upon the outside -frame shewn in Fig. 1 an automatictripping wedge 65 which is adjustable upon a way 66. This wedge is adjustable vertically along the way to limit the downwardmovement of the grinding wheel. ltfunctions to trip the automatic push rod (51 when the'head has moved downward to a position where the trip rod e'ontac tswith the wedge. The tripping of this push rodrauses the wedge 62 to ttorce the yoke'53 downwardly causing the clutch crab to engage the lower bevel gear and reverse the downward travel of the head so that it is automatically i'ed upward to its initial position. On the lower end of the shaft 5Iis a. bevel gear 67 meshing with the bevel gear 68 fixedly mounted upon the horizontal shaft '69 upon which i are also Mill mounted pinions 'and 71. These pinions mesh with larger pinions 7 2 and 7 3 rotatably mounted upon the shaft 741. Between the pinions is a clutch mechanism 7 5vwhich is operated through the arms 76 itlld77'by the handle 78. In addition'tothe gears'72 and 73 there is mounted uponthe shaft 74 worm 79 meshing with a worm gear 80 on the shaft 81. This shaftextends horizontally across the entire frame and carries two pinions 82 which mesh with. the racks 5 and serve to feed the head upward and downward in its reciprocatingmovement as the grinding wheel is fed from the top to the bottom of the cylinder cavity during the grinding operation. The purpose of the clutch mechanism 75 with the differential gearing which it controls is to supply a further speed change to the rate of travel in addition to the multiple speed supplied by" the multiple gears 4.3 and 4:4: and the speed gear change controlled by the lever 33 and differential gearing on the shafts 2a and 29. If it is desired to raise or lower the head manually by means of the spider wheel 83 it is only necessary to slide the spoke wheel outwardly upon the shaft so that the" crab 84engages member 85 which is pinned to the shaft 81. At other times when the handle is upon the shaft 81. This is to prevent its rotation during the automatic feeding of the head. WVhen manually operated the clutchimechanism 75 should be in neutral position as shown in Figs. 5 and 6 so that I the shaft 74 will turn freely with the shaft 81. Thus it is possible to get a largenumber of speed gear changes in the speed of the vertical travel of "the grinding wheel. The control is such that vertical speeds from seven thousand toone-quarter of an inch per revolution with a number of intermediate speeds may be produced. The mechanism iscompact and all operating parts travel with the head during its vertical reciprocation,

I claim as my invention: v

1. In a grindingmachine, the combination with a frame having vertical supporting columns with. a central longitudinal opening, 'of a head having mountedthereon an arbor enclosing a grinding wheel spindle,a mechanism for producing vertical reciprocation of the head, a motor mounted on the head for driving the respective mechanisms,

the head and its elements reciprocating as a unit. eccentric means manually set and automatically operated for givingthe axis of the grinding wheel spindle a rotative movement during the vertical reciprocation of the head.

2. In a grinding machine, the combination with a frame having spaced vertical of a reciprocating supporting columns, head having mounted thereon agrinding during the vertical reciprocation of the head.

- spective mechanisms,

vertical reciprocation of the head, a motor for driving the respective mechanisms, said elements mounted on'and reciprocating with the "head, eccentric means manually set and automatically operated for moving the axis of the grinding wheel spindle in a circular orbit during the vertical reciprocation'of the head. i

3. In a grinding machine, the combination with a frame having spaced vertical supporting columns, of a balanced head having mounted on one end and reciprocating therewith as a unit, a grinding wheel spindle, a mechanism for producing vertical reciprocation of the head and a motor mounted on the'opposite end of the head and moving. with it for driving the respectivemechanisms, eccentric means adapted to be manually set to a micrometric scale andfautomatically driven for. moving the axis of the grinding wheel spindle in'a circular orbit 4:. In a grinding machine, the'combination with ,a frame, of a balanced head hav-,

ing'mounted on one end thereof and integrally functioning therew1th,-a grinding spindle,- a mechanism for producing vertical reciprocation of the head, and amotor mounted on the opposite end and integrally functioning therewith for driving the resaid reciprocating mechanism driven through a series of differential gear trains from the motor.

5. In'a grinding machine, the combina tion with a frame of a head vertically movable upon the frame and having mounted thereon and reciprocating therewith, a grinding wheel spindle, a mechanism for producing longitudinal. reciprocation of the head, and a motor mounted on the head and movable therewith fordriving the respective mechanisms, means mounted on the frame cooperating with means onfthe head for reversing the travel of the head at a predetermined point.

' 6. In a grinding'machine, the combination with a frame having spaced vertical supporting columns, of a balanced head havingmounted thereonan arbor enclosing a grinding wheel spindle, a mechanism for producing vertical reciprocation of the head, a motor mounted on. and reciprocating with, the head for rotating the grinding wheel spindle, the head and its elements reciprocating'as a unit. Y

7. Ina grinding machine, the combination Nvith a frame having spaced vertical supporting columns, ofa balanced reciprocating head having mounted thereon a grinding wheelspindle, a mechanism communicating through the space-d columns :for producing vertical reciprocation of the head, a motor for rotating the grinding wheel spindle, said motor mounted .on and reciprocating With the head. i

8. In a vertical grindingg machine the combination with a frame having spaced iertic al supporting columns, of a balanced head vertically movable in the space between the :VBI'tiQZIl columns :and having mounted thereon and reciprocating therewith a grinding Wheel spindie; and a motor mounted on the head and mowah-le therewith for rotating the grinding Wheel spindle, ameehanism for producing Longitudinal reciprocation of the head and means mounted on the frame operated byeontaeting means on the head for reversing the travel of the head at a predetermined point.

MARTIN L. W'ILLI 

